EP3826951B1 - Elevator control cabinet with a voice communication apparatus and method to monitoring a cabinet door - Google Patents
Elevator control cabinet with a voice communication apparatus and method to monitoring a cabinet door Download PDFInfo
- Publication number
- EP3826951B1 EP3826951B1 EP19734104.3A EP19734104A EP3826951B1 EP 3826951 B1 EP3826951 B1 EP 3826951B1 EP 19734104 A EP19734104 A EP 19734104A EP 3826951 B1 EP3826951 B1 EP 3826951B1
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- Prior art keywords
- cabinet
- control
- elevator
- door
- cabinet door
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/021—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions the abnormal operating conditions being independent of the system
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B2201/00—Aspects of control systems of elevators
- B66B2201/20—Details of the evaluation method for the allocation of a call to an elevator car
- B66B2201/23—Other aspects of the evaluation method
Definitions
- the invention relates to an elevator control cabinet with a voice communication apparatus, an elevator system comprising such a control cabinet and a method to monitoring a cabinet door.
- An electric control system of an elevator consists generally of at least a controller, an operating device, a leveling device, a power supply, communication devices, switches and other components. Most of these devices and components are put and integrated into a so-called control cabinet or controller cabinet. Such a control cabinet is normally set in a machine-room (MR) or located on a wall near a shaft door on the bottom floor or top floor for a machine-room-less (MRL) elevator.
- MR machine-room
- MLR machine-room-less
- a technician For an installation, a maintenance or an inspection working, a technician usually has to open a door of the control cabinet at first and operate the components and devices inside of this control cabinet to control the elevator. Sometimes the technician needs to repair or exchange one or more of these components or devices. After the work, the cabinet door has to be closed again, so that the control cabinet and its components are not accessible for persons who are not authorized to operate with this cabinet. For this reason, such a control cabinet comprises a door contact sensor to detect whether the cabinet door is open or closed. Then the door contact sensor will tell a security system or a control unit about the detected status of the door in order to trigger an alarm signal.
- Door contact sensors or the like are known in many forms. An available door contact sensor is normally constructed e.g. in two parts, one part is installed on the door while the other piece is fixed on the door jamb or frame.
- One object of an embodiment may be to optimize a door monitoring of an elevator control cabinet and to increase the access security of this control cabinet.
- US 2018148298 A1 discloses a method for monitoring a conveying system with a monitoring device includes recording a signal pattern progression in relation to a functional unit of the conveying system.
- a reference signal progression is stored in a database as is a correlation data set for the reference signal progression, the correlation data set including instants or time segments in the reference signal progression and reference to the functional unit.
- CN 207108147 U discloses an elevator control case.
- the inner side of the left side panel of the case is provided with a detection switch for being electrically connected with the controller of the elevator and detecting whether the front door is closed or not.
- CN 203294978 U discloses a safety device for a control case of an elevator.
- a micro switch is added and electrically connected with the control mainboard.
- JP H10203745 A discloses a lift remote monitoring system which may transmit a door-opening- and a door-closing-command to a terminal device through a telecommunication line, when receiving information that abnormality occurs to door opening and closing sound from a user or a controller of the lift. Thereafter, a door control means opens and closes a lift door on the side of the terminal device receiving this door opening and closing command. At this time, a sound transmission means transmits door opening and closing sound collected by an interphone to a remote monitoring device through a telecommunication line, and the door opening and closing sound transmitted from the terminal device is reproduced on the side of the remote monitoring device. Consequently, an engineer in the monitoring center can estimate a cause of abnormality occurrence and a countermeasure by previously hearing actual door opening and closing sound of the lift in advance before visiting a site for inspection and can precisely correspond to it.
- a control cabinet for an elevator comprises a voice communication apparatus having a microphone, an electronic control arrangement, an evaluation unit, and a cabinet housing and at least one cabinet door.
- the electronic control arrangement is intended for controlling the elevator.
- the voice communication apparatus is provided e.g. to execute a service or emergency call or establish a communication between the elevator and a public communication network.
- the microphone of this voice communication apparatus is able to detect a surrounding noise in the control cabinet.
- the evaluation unit is so configured that it can convert the detected noise into a noise pattern and then compare this noise pattern with a reference sound pattern which is predetermined for a surrounding noise in the cabinet housing with the open or closed cabinet door. This reference sound pattern is saved in a storage unit of the control arrangement.
- the evaluation unit will recognize a door status of the cabinet door whether it is open or closed. Then a control cabinet including the components and devices inside can be more safely protected. As the access security of the control cabinet is increased, the safety of an elevator will be also improved.
- the invention is beneficial in that the microphone in the cabinet is used as a door sensor.
- the microphone acts here as an interface between a sound field and a measuring system. It transfers sound pressure oscillations in the air into electrical signals.
- the microphone can be of the following types: piezoelectric, condenser, electric or dynamic microphone or other varieties like MEMS (microelectromechanical system), ribbon, carbon, fiber optic, laser as well as a speaker as microphone.
- MEMS microelectromechanical system
- the most common one is the piezoelectric microphone, whereat a membrane (not illustrated) is attached to a piezoelectric crystal which generates an electric current when submitted to mechanical tension.
- the air vibrations resulting from the sound waves are picked up by the microphone membrane, and the resulting pressure on the piezoelectric crystal transforms the vibration into an electric signal.
- the microphone is integrated in the voice communication apparatus and could be allocated away from the cabinet door, the microphone is thus much less prone to dust, water, rust, oil, chemical pollution and any other pollution caused by
- the electronic, electric and electro-mechanical devices or elements in the control cabinet are composed of various noise sources such as relays, fans, transformers, converters, processing units, etc.
- a sound pressure depends on environment, structure and material of reflecting surface, distance, ambient sounds, and so on, so that a sound or a noise detected by the microphone must be different in the case when the cabinet door is closed or opened.
- the status of the cabinet door can be determined. Therefore, a door sensor is no longer necessary. This can save construction costs and enhance the accuracy of the door monitoring.
- the service access security of the elevator can be better ensured, as it will be prevented that the cabinet with an open door is accessible for an authorized person.
- This monitoring possibility of the cabinet door can be also used to detect a technician's visiting and her/his attendance so that it is able to determine whether the technician has left the elevator or the service working is finished completely.
- the control arrangement comprises a control unit, and the evaluation unit reports the detected door status to this control unit.
- the control unit could be a main control for the elevator or is only responsible for this control cabinet.
- the voice communication apparatus comprises further a loudspeaker which is activatable by the control unit to generate an alarm signal.
- the alarm signal is an acoustic and/or optical signal and will be generated when the cabinet door stays still open after a certain time and/or according to a status of a certain switch, e.g. an emergency switch or an operating switch.
- the elevator can be set in a service (installation/inspection/maintenance) mode and a normal operation mode.
- the control unit can activate the loudspeaker in relation to an operation mode of the elevator, wherein the loudspeaker generates the alarm signal when the elevator is set in a normal operation mode and the cabinet door is open and/or when the elevator is set in a service mode and the cabinet door is closed.
- the loudspeaker will generate the alarm signal in a predetermined time period (e.g. three minutes) after detecting the status (closed or open) of the cabinet door and/or the operation mode (service mode or normal operation mode) of the elevator.
- the electronic control arrangement comprises a noise producing element for generating a defined surrounding noise which can be used to determine whether the cabinet door is open or closed.
- a noise producing element for generating a defined surrounding noise which can be used to determine whether the cabinet door is open or closed.
- the detection of the door status is also possible, when the environmental noise level is very low.
- the loudspeaker of the voice communication apparatus can be used as a noise producing element.
- the electronic control arrangement comprises further an electronic power unit which is connectable with an electromotor to drive a car of the elevator.
- the electronic power unit can disconnect the electromotor from its power supply when the loudspeaker generates an alarm signal, then the elevator car will be stopped and can't move anymore.
- the voice communication apparatus is an elevator intercom system.
- An intercom also called as tele-alarm
- An intercom connects passengers, technicians, and safety facilities independent from a public network like telecommunication network, e.g. PSTN (Public Switched Telephone Network) and is applied to elevator emergency or overhauling.
- PSTN Public Switched Telephone Network
- a typical using of intercom is e.g. to establish a communication between a machine room and an elevator car.
- control cabinet can be disposed in a machine room, in and/or outside of a hoistway of the elevator, e.g. inside of an elevator car, on the car roof or on the bottom of the hoistway.
- an elevator system comprises a control cabinet according to the aforedescribed one embodiment.
- a method to monitoring a cabinet door status of a control cabinet which comprises a voice communication apparatus having a microphone, an electronic control arrangement to control the elevator, an evaluation unit, a cabinet housing and at least one cabinet door.
- the method comprising the steps of:
- a loudspeaker of a voice communication apparatus can be activated by the control unit in relation to an operation mode of the facility to generate an alarm signal when the facility is set in a normal operation mode and the cabinet door is open and/or when the facility is set in a service mode and the cabinet door is closed.
- the loudspeaker is activated to generate the alarm signal after a predetermined time period when the cabinet door has been closed or opened and/or when the facility has been changed its operation mode.
- a predefined surrounding noise is generated by a noise producing element or by the loudspeaker of the voice communication apparatus.
- the detection of the door status is also possible, when the environmental noise level is very low.
- Fig. 1 illustrates a perspective view of a control cabinet for an elevator.
- Fig. 1 illustrates a control cabinet 1 constructed in accordance with the present disclosure.
- This control cabinet 1 can be installed for an elevator (not illustrated) in a machine room, at an elevator car, in and/or outside of a hoistway, for example, in a hoistway door frame or in a wall on the floor.
- an elevator there could be one or more control cabinets available.
- a cabinet housing 10 of this control cabinet 1 there is a voice communication apparatus 2, e.g. intercom system.
- the elevator intercom system is applied to such as elevator emergency or service application.
- This voice communication apparatus 2 comprises a microphone 3 and a loudspeaker 8 which can provide audible sounds as well as a buzzing sound.
- the microphone 3 is for instance a piezoelectric microphone.
- control arrangement 6 Besides the voice communication apparatus 2 there are an electronic control arrangement 6 and on demand also other devices or components inside of the cabinet housing 10, wherein the control arrangement 6 comprises further a control unit 7, an evaluation device 5 and an electronic power unit 9.
- the electronic power unit 9 is connectable with an electromotor (not illustrated) which is as a drive motor for the elevator.
- the microphone 3 as a sound sensor captures these surrounding noises and transfers them into electrical signals, wherein the noises can be characterized e.g. by frequency spectrum, amplitude distribution and the physical mechanism that generates it. Therefore, it is possible to analyze and evaluate a noise pattern based on these detected noises.
- the cabinet housing 10 can be closed and locked with a cabinet door 4.
- the evaluation unit 5 can convert the detected noise into a noise pattern and then compare this noise pattern with at least one reference sound pattern.
- the reference sound patterns are predetermined based on a surrounding noise detected in the cabinet housing 10 with the open and/or closed cabinet door 4 respectively and saved in a storage unit 11 of the control arrangement 6. According to a result of the comparison, the evaluation unit 5 will recognize a door status of the cabinet door 4 whether it is open or closed.
- the evaluation unit 5 reports then the detected door status to the control unit 7.
- the control unit 7 maybe responsible for the elevator or only for this control cabinet 1.
- the control unit 7 will actuate the loudspeaker 8 to generate an alarm signal when e.g. the cabinet door 4 still stays open for a certain time after that an inspection working is already finished or an operation mode switch has been switched from a service mode to a normal operation mode. This means that the control unit 7 won't actuate the loudspeaker 8 and may ignore the case if the door 4 has been opened and shortly subsequently "closed” again.
- the alarm signal is generated when the elevator has been set in the service mode and the cabinet door 4 is closed.
- the electronic power unit 9 of the control arrangement 6 can disconnect the electromotor from its power supply when the alarm signal is generated. Then the elevator car of the elevator can no more move.
- the evaluation unit 5 can not identify whether the door 4 is open or closed, when the detected environmental noise level is very low or the background noise is too high.
- the loudspeaker 8 can act as a noise producing element 8a to simulate and generate a predefined surrounding noise which can be saved in the storage unit 11 too.
- the microphone 3 will detect this simulated surrounding noise, with the same procedure as described above, it can be detected whether the door status currently is open or closed.
- Such a measure intends to alert a technician to an unsafe condition if she/he has been forgetting to close the cabinet door 4 after an inspection work. Although when the cabinet door 4 is closed, but the elevator is still in a service mode, it may generate an alarm signal, this will prevent that a device or an element perhaps has been forgotten to switch back to its original state. It is also helpful for reminding the technician to check the control cabinet 1 again.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Electromagnetism (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Description
- The invention relates to an elevator control cabinet with a voice communication apparatus, an elevator system comprising such a control cabinet and a method to monitoring a cabinet door.
- An electric control system of an elevator consists generally of at least a controller, an operating device, a leveling device, a power supply, communication devices, switches and other components. Most of these devices and components are put and integrated into a so-called control cabinet or controller cabinet. Such a control cabinet is normally set in a machine-room (MR) or located on a wall near a shaft door on the bottom floor or top floor for a machine-room-less (MRL) elevator.
- For an installation, a maintenance or an inspection working, a technician usually has to open a door of the control cabinet at first and operate the components and devices inside of this control cabinet to control the elevator. Sometimes the technician needs to repair or exchange one or more of these components or devices. After the work, the cabinet door has to be closed again, so that the control cabinet and its components are not accessible for persons who are not authorized to operate with this cabinet. For this reason, such a control cabinet comprises a door contact sensor to detect whether the cabinet door is open or closed. Then the door contact sensor will tell a security system or a control unit about the detected status of the door in order to trigger an alarm signal. Door contact sensors or the like are known in many forms. An available door contact sensor is normally constructed e.g. in two parts, one part is installed on the door while the other piece is fixed on the door jamb or frame.
- But wear and environment pollution seriously influences the reliability of electric contacts. Failures of electric devices or elements are closely related to this problem. Electric contact and electrical characteristics are also strongly dependent on dust, water, oil etc. For example, dust contamination is a major cause of current disruption in electric contacts. Effective ways to reduce the failure caused by fine dust particles still present a difficult and unsolved problem.
- One object of an embodiment may be to optimize a door monitoring of an elevator control cabinet and to increase the access security of this control cabinet.
-
US 2018148298 A1 discloses a method for monitoring a conveying system with a monitoring device includes recording a signal pattern progression in relation to a functional unit of the conveying system. A reference signal progression is stored in a database as is a correlation data set for the reference signal progression, the correlation data set including instants or time segments in the reference signal progression and reference to the functional unit. -
CN 207108147 U discloses an elevator control case. The inner side of the left side panel of the case is provided with a detection switch for being electrically connected with the controller of the elevator and detecting whether the front door is closed or not. -
CN 203294978 U discloses a safety device for a control case of an elevator. A micro switch is added and electrically connected with the control mainboard. When the case door is unclosed, the elevator is always in a maintenance state, and maintainers must close the door to enable the elevator to operate normally, so that running of the elevator due to carelessness of the maintainers under the condition that the case door is unclosed can be avoided. -
JP H10203745 A - Such an object may be achieved by the subject-matter of the independent claims. Further exemplary embodiments are evident from the dependent claims and the following description.
- According to the present invention, a control cabinet for an elevator comprises a voice communication apparatus having a microphone, an electronic control arrangement, an evaluation unit, and a cabinet housing and at least one cabinet door. The electronic control arrangement is intended for controlling the elevator. The voice communication apparatus is provided e.g. to execute a service or emergency call or establish a communication between the elevator and a public communication network. And the microphone of this voice communication apparatus is able to detect a surrounding noise in the control cabinet. And the evaluation unit is so configured that it can convert the detected noise into a noise pattern and then compare this noise pattern with a reference sound pattern which is predetermined for a surrounding noise in the cabinet housing with the open or closed cabinet door. This reference sound pattern is saved in a storage unit of the control arrangement. In dependence on a result of the comparison, the evaluation unit will recognize a door status of the cabinet door whether it is open or closed. Then a control cabinet including the components and devices inside can be more safely protected. As the access security of the control cabinet is increased, the safety of an elevator will be also improved.
- The invention is beneficial in that the microphone in the cabinet is used as a door sensor. The microphone acts here as an interface between a sound field and a measuring system. It transfers sound pressure oscillations in the air into electrical signals. The microphone can be of the following types: piezoelectric, condenser, electric or dynamic microphone or other varieties like MEMS (microelectromechanical system), ribbon, carbon, fiber optic, laser as well as a speaker as microphone. The most common one is the piezoelectric microphone, whereat a membrane (not illustrated) is attached to a piezoelectric crystal which generates an electric current when submitted to mechanical tension. The air vibrations resulting from the sound waves are picked up by the microphone membrane, and the resulting pressure on the piezoelectric crystal transforms the vibration into an electric signal. Because the microphone is integrated in the voice communication apparatus and could be allocated away from the cabinet door, the microphone is thus much less prone to dust, water, rust, oil, chemical pollution and any other pollution caused by a sudden or gradual process to a normal electric door contact sensor.
- The electronic, electric and electro-mechanical devices or elements in the control cabinet are composed of various noise sources such as relays, fans, transformers, converters, processing units, etc. As a sound pressure depends on environment, structure and material of reflecting surface, distance, ambient sounds, and so on, so that a sound or a noise detected by the microphone must be different in the case when the cabinet door is closed or opened. By taking advantage of this physical phenomenon, the status of the cabinet door can be determined. Therefore, a door sensor is no longer necessary. This can save construction costs and enhance the accuracy of the door monitoring. In the meanwhile, the service access security of the elevator can be better ensured, as it will be prevented that the cabinet with an open door is accessible for an authorized person. This monitoring possibility of the cabinet door can be also used to detect a technician's visiting and her/his attendance so that it is able to determine whether the technician has left the elevator or the service working is finished completely.
- As an improvement of the present invention, the control arrangement comprises a control unit, and the evaluation unit reports the detected door status to this control unit. The control unit could be a main control for the elevator or is only responsible for this control cabinet. The voice communication apparatus comprises further a loudspeaker which is activatable by the control unit to generate an alarm signal. For example, the alarm signal is an acoustic and/or optical signal and will be generated when the cabinet door stays still open after a certain time and/or according to a status of a certain switch, e.g. an emergency switch or an operating switch.
- As a further improvement of the present invention, the elevator can be set in a service (installation/inspection/maintenance) mode and a normal operation mode. The control unit can activate the loudspeaker in relation to an operation mode of the elevator, wherein the loudspeaker generates the alarm signal when the elevator is set in a normal operation mode and the cabinet door is open and/or when the elevator is set in a service mode and the cabinet door is closed. Advantageously, the loudspeaker will generate the alarm signal in a predetermined time period (e.g. three minutes) after detecting the status (closed or open) of the cabinet door and/or the operation mode (service mode or normal operation mode) of the elevator.
- As a further improvement of the present invention, the electronic control arrangement comprises a noise producing element for generating a defined surrounding noise which can be used to determine whether the cabinet door is open or closed. With the help of the additionally generated noise the detection of the door status is also possible, when the environmental noise level is very low. Optionally, the loudspeaker of the voice communication apparatus can be used as a noise producing element.
- As a further improvement of the present invention, the electronic control arrangement comprises further an electronic power unit which is connectable with an electromotor to drive a car of the elevator. The electronic power unit can disconnect the electromotor from its power supply when the loudspeaker generates an alarm signal, then the elevator car will be stopped and can't move anymore.
- As an improvement of the present invention, the voice communication apparatus is an elevator intercom system. An intercom (also called as tele-alarm) connects passengers, technicians, and safety facilities independent from a public network like telecommunication network, e.g. PSTN (Public Switched Telephone Network) and is applied to elevator emergency or overhauling. A typical using of intercom is e.g. to establish a communication between a machine room and an elevator car.
- Furthermore advantageously, the control cabinet can be disposed in a machine room, in and/or outside of a hoistway of the elevator, e.g. inside of an elevator car, on the car roof or on the bottom of the hoistway.
- According to other embodiments, an elevator system comprises a control cabinet according to the aforedescribed one embodiment.
- According to other embodiments, a method to monitoring a cabinet door status of a control cabinet which comprises a voice communication apparatus having a microphone, an electronic control arrangement to control the elevator, an evaluation unit, a cabinet housing and at least one cabinet door. The method comprising the steps of:
- detecting a surrounding noise in the control cabinet by the microphone,
- converting this detected surrounding noise into a noise pattern and comparing this noise pattern with a predetermined reference sound pattern by the evaluation unit, wherein the reference sound pattern is determined from a surrounding noise in the cabinet housing with a defined cabinet door status, and
- determining a door status of the cabinet door whether this cabinet door is open or closed.
- Optionally, a loudspeaker of a voice communication apparatus can be activated by the control unit in relation to an operation mode of the facility to generate an alarm signal when the facility is set in a normal operation mode and the cabinet door is open and/or when the facility is set in a service mode and the cabinet door is closed.
- Optionally, the loudspeaker is activated to generate the alarm signal after a predetermined time period when the cabinet door has been closed or opened and/or when the facility has been changed its operation mode.
- Optionally, a predefined surrounding noise is generated by a noise producing element or by the loudspeaker of the voice communication apparatus. With the help of the additionally generated noise, the detection of the door status is also possible, when the environmental noise level is very low.
- Other technological benefits of the present invention become evident to a person skilled in the art from the following description and the claims.
- The above, as well as other advantages of the present invention, will become readily apparent to those skilled in the art from the following detailed description of a preferred embodiment when considered in the light of the accompanying drawing in which:
Fig. 1 illustrates a perspective view of a control cabinet for an elevator. -
Fig. 1 illustrates a control cabinet 1 constructed in accordance with the present disclosure. This control cabinet 1 can be installed for an elevator (not illustrated) in a machine room, at an elevator car, in and/or outside of a hoistway, for example, in a hoistway door frame or in a wall on the floor. In one elevator there could be one or more control cabinets available. In acabinet housing 10 of this control cabinet 1 there is avoice communication apparatus 2, e.g. intercom system. The elevator intercom system is applied to such as elevator emergency or service application. Thisvoice communication apparatus 2 comprises amicrophone 3 and a loudspeaker 8 which can provide audible sounds as well as a buzzing sound. Themicrophone 3 is for instance a piezoelectric microphone. Besides thevoice communication apparatus 2 there are an electronic control arrangement 6 and on demand also other devices or components inside of thecabinet housing 10, wherein the control arrangement 6 comprises further acontrol unit 7, anevaluation device 5 and anelectronic power unit 9. Theelectronic power unit 9 is connectable with an electromotor (not illustrated) which is as a drive motor for the elevator. - These electric and electronic devices and components in the cabinet 1 make various noises because of their operations like switching, venting or vibrations resulted by electromagnetic fields and so on. The
microphone 3 as a sound sensor captures these surrounding noises and transfers them into electrical signals, wherein the noises can be characterized e.g. by frequency spectrum, amplitude distribution and the physical mechanism that generates it. Therefore, it is possible to analyze and evaluate a noise pattern based on these detected noises. - The
cabinet housing 10 can be closed and locked with acabinet door 4. As the cabinet's acoustic properties are related to the housing's size, shape, material, surface absorption and ambient or background noise etc., so that the noises detected by themicrophone 3 are different when thecabinet door 4 is closed or opened. Theevaluation unit 5 can convert the detected noise into a noise pattern and then compare this noise pattern with at least one reference sound pattern. The reference sound patterns are predetermined based on a surrounding noise detected in thecabinet housing 10 with the open and/orclosed cabinet door 4 respectively and saved in astorage unit 11 of the control arrangement 6. According to a result of the comparison, theevaluation unit 5 will recognize a door status of thecabinet door 4 whether it is open or closed. - The
evaluation unit 5 reports then the detected door status to thecontrol unit 7. Thecontrol unit 7 maybe responsible for the elevator or only for this control cabinet 1. Thecontrol unit 7 will actuate the loudspeaker 8 to generate an alarm signal when e.g. thecabinet door 4 still stays open for a certain time after that an inspection working is already finished or an operation mode switch has been switched from a service mode to a normal operation mode. This means that thecontrol unit 7 won't actuate the loudspeaker 8 and may ignore the case if thedoor 4 has been opened and shortly subsequently "closed" again. On the contrary, the alarm signal is generated when the elevator has been set in the service mode and thecabinet door 4 is closed. Theelectronic power unit 9 of the control arrangement 6 can disconnect the electromotor from its power supply when the alarm signal is generated. Then the elevator car of the elevator can no more move. - Sometimes it would happen that the
evaluation unit 5 can not identify whether thedoor 4 is open or closed, when the detected environmental noise level is very low or the background noise is too high. For this case, the loudspeaker 8 can act as a noise producing element 8a to simulate and generate a predefined surrounding noise which can be saved in thestorage unit 11 too. Themicrophone 3 will detect this simulated surrounding noise, with the same procedure as described above, it can be detected whether the door status currently is open or closed. - Such a measure intends to alert a technician to an unsafe condition if she/he has been forgetting to close the
cabinet door 4 after an inspection work. Although when thecabinet door 4 is closed, but the elevator is still in a service mode, it may generate an alarm signal, this will prevent that a device or an element perhaps has been forgotten to switch back to its original state. It is also helpful for reminding the technician to check the control cabinet 1 again. - It is obvious to a person skilled in the art that with the advancement of technology, the basic idea of the invention may be implemented in various ways. The invention and its embodiments are thus not limited to the examples described above; instead they may vary within the scope of the claims. Finally, it should be noted that terms such as "comprising" do not exclude other elements or steps and that terms such as "a" or "an" do not exclude a plurality. Also, elements described in association with different embodiments may be combined. It should also be noted that reference signs in the claims should not be construed as limiting the scope of the claims.
-
- 1
- Control cabinet
- 2
- Voice communication apparatus
- 3
- microphone
- 4
- cabinet door
- 5
- evaluation unit
- 6
- control arrangement
- 7
- control unit
- 8
- loudspeaker
- 8a
- noise producing element
- 9
- power unit
- 10
- cabinet housing
- 11
- storage unit
Claims (15)
- A control cabinet (1) for an elevator, comprising:- a voice communication apparatus (2) having a microphone (3) which is able to detect a surrounding noise in the control cabinet (1),- an electronic control arrangement (6) to control the elevator,- an evaluation unit (5), and- a cabinet housing (10) and at least one cabinet door (4),characterized in that- the evaluation unit (5) is configured to convert this detected surrounding noise into a noise pattern and compare this noise pattern with a predetermined reference sound pattern, wherein the reference sound pattern is determined from a surrounding noise in the cabinet housing (10) with a defined cabinet door (4) status and saved in a storage unit (11) of the electronic control arrangement (6), and- the evaluation unit (5) recognizes a door status of the cabinet door (5) whether this cabinet door (5) is open or closed.
- A control cabinet (1) according to claim 1, whereinthe control arrangement (6) comprises a control unit (7), andthe evaluation unit (5) reports the door status of the cabinet door (4) to this control unit (7).
- A control cabinet (1) according to claim 2, whereinthe voice communication apparatus (2) comprises a loudspeaker (8), and the control unit (7) can activatethe loudspeaker (8) to generate an alarm signal.
- A control cabinet (1) according to claim 3, wherein
the control unit (7) can activate the loudspeaker (8) in relation to an operation mode of the elevator, wherein the loudspeaker (8) generates the alarm signal when the elevator is set in a normal operation mode and the cabinet door (4) is open and/or when the elevator is set in a service mode and the cabinet door (4) is closed. - A control cabinet (1) according to one of claims 3 or 4, wherein
the control unit (7) activates the loudspeaker (8) to generate the alarm signal after a predetermined time period when the cabinet door (4) has been closed or opened and/or when the elevator has been changed its operation mode. - A control cabinet (1) according to one of the preceding claims 1 to 5, wherein the electronic control arrangement (6) comprises further an electronic power unit (9) which is connectable with an electromotor, wherein the electronic power unit (9) can disconnect the electromotor from its power supply when the alarm signal is generated.
- A control cabinet (1) according to one of the preceding claims, comprising a noise producing element (8a) for generating a predefined surrounding noise.
- A control cabinet (1) according to claim 7, wherein the loudspeaker (8) can be activated as the noise producing element to generate the defined surrounding noise.
- A control cabinet (1) according to one of the preceding claims, wherein
the voice communication apparatus (2) is an elevator intercom system. - A control cabinet (1) according to one of the preceding claims, wherein
the control cabinet (1) is disposed in a machine room, in and/or outside of a hoistway of the elevator. - Method to monitor a cabinet door status of a control cabinet (1) comprising- a voice communication apparatus (2) having a microphone (3) and a loudspeaker (8),- an electronic control arrangement (6) to control a facility, especially for an elevator,- an evaluation unit (5), and- a cabinet housing (10) and at least one cabinet door (4),the method comprising the step of:- detecting a surrounding noise in the control cabinet (1) by the microphone (3),characterized in the method further comprising the steps of:- converting this detected surrounding noise into a noise pattern and comparing this noise pattern with a predetermined reference sound pattern by the evaluation unit (5), wherein the reference sound pattern is determined from a surrounding noise in the cabinet housing (10) with a defined cabinet door (4) status, and- determining a door status of the cabinet door (5) whether this cabinet door (5) is open or closed.
- Method of claim 11, further comprising the steps of:- activating the loudspeaker (8) of the voice communication apparatus (2) in relation to an operation mode of the facility, and- generating an alarm signal when the facility is set in a normal operation mode and the cabinet door (4) is open and/or when the facility is set in a service mode and the cabinet door (4) is closed.
- Method of claim 12, further comprising the step of:
activating the loudspeaker (8) to generate the alarm signal after a predetermined time period when the cabinet door (4) has been closed or opened and/or when the facility has been changed its operation mode. - Method of one of the claims 11 to 13, further comprising the step of:- generating a predefined surrounding noise by a noise producing element (8a) or by the loudspeaker (8).
- An elevator system comprises at least a control cabinet (1) according to one of the preceding claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18185803 | 2018-07-26 | ||
PCT/EP2019/067828 WO2020020589A1 (en) | 2018-07-26 | 2019-07-03 | Elevator control cabinet with a voice communication apparatus and method to monitoring a cabinet door |
Publications (2)
Publication Number | Publication Date |
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EP3826951A1 EP3826951A1 (en) | 2021-06-02 |
EP3826951B1 true EP3826951B1 (en) | 2023-06-28 |
Family
ID=63077781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19734104.3A Active EP3826951B1 (en) | 2018-07-26 | 2019-07-03 | Elevator control cabinet with a voice communication apparatus and method to monitoring a cabinet door |
Country Status (4)
Country | Link |
---|---|
US (1) | US20210163258A1 (en) |
EP (1) | EP3826951B1 (en) |
CN (1) | CN112424101B (en) |
WO (1) | WO2020020589A1 (en) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10203745A (en) * | 1997-01-21 | 1998-08-04 | Toshiba Elevator Kk | Elevator remote monitoring system |
US7106868B2 (en) * | 2002-05-15 | 2006-09-12 | Siemens Vdo Automotive Inc. | Active noise control for vehicle door noise |
CN101782464B (en) * | 2010-03-03 | 2011-12-28 | 罗新宇 | Method and instrument thereof for acoustic diagnosis of automobile engine |
CN101949241B (en) * | 2010-09-10 | 2012-10-17 | 上海交通大学 | Intelligent switch device and method of car door |
CN102117040B (en) * | 2011-01-24 | 2012-07-04 | 珠海赛纳打印科技股份有限公司 | Image forming apparatus and image forming method |
CN203294978U (en) * | 2013-06-24 | 2013-11-20 | 上海盖普电梯有限公司 | Safety device for control cabinet of elevator without machine room |
GB2526072B (en) * | 2014-05-02 | 2019-08-14 | Ensota Ltd | A method of operating an automatic door installation |
CN107771160B (en) * | 2015-06-02 | 2020-03-24 | 因温特奥股份公司 | Method for monitoring a transport device, monitoring device, and corresponding storage medium and transport device |
CN106379782A (en) * | 2016-10-10 | 2017-02-08 | 杭州凌萤科技有限公司 | Single elevator control cabinet detecting method |
CN207108147U (en) * | 2017-04-24 | 2018-03-16 | 住友富士电梯有限公司 | A kind of elevator control cabinet |
CN206894801U (en) * | 2017-07-07 | 2018-01-16 | 合肥师范学院 | A kind of video monitoring apparatus |
CN108238523B (en) * | 2018-03-15 | 2023-06-02 | 福建师范大学 | False opening warning device for hoistway door |
-
2019
- 2019-07-03 EP EP19734104.3A patent/EP3826951B1/en active Active
- 2019-07-03 CN CN201980045362.3A patent/CN112424101B/en active Active
- 2019-07-03 US US17/250,471 patent/US20210163258A1/en active Pending
- 2019-07-03 WO PCT/EP2019/067828 patent/WO2020020589A1/en active Application Filing
Also Published As
Publication number | Publication date |
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CN112424101A (en) | 2021-02-26 |
WO2020020589A1 (en) | 2020-01-30 |
US20210163258A1 (en) | 2021-06-03 |
CN112424101B (en) | 2022-07-08 |
EP3826951A1 (en) | 2021-06-02 |
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